-378 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-378 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 10.475 in (266.07 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 10.895 in (276.73 mm), catalogued under part number H70378. It creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists water, many alcohols, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving ketones or ozone and direct sunlight call for a different compound.

You will find this material specified across construction equipment, general industrial maintenance, and fluid power.

Order part number H70378, sold individually. Unit weight is approximately 23.398 g and nominal inside diameter is listed as 10 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.